I think your points generally stand, but I think Facebook open source raises some specific issues at least worth consideration: If your use of it contributes t

I think your points generally stand, but I think Facebook open source raises some specific issues at least worth consideration: If your use of it contributes to its popularity, perhaps becoming the standard of X area, does that give Facebook the company more power and possibly enable other unethical actions? I think it's probably not as much of a worry given the narrowness of the area, but I do think this is something to consider when it comes to React for example.